US5020497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling ignition timing of an engine for marine vessels
Assignee: Suzuki Motor Corp
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Filing: 1990-01-23
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Granted: 1991-06-04
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Expires: 2010-01-23
Abstract
Abstract A method for controlling an engine for a marine vessel which includes, when a sudden fluctuation of a load is to be generated due to connecting or disconnecting of a load at a low speed of the engine, the step of advancing the spark ignition timing by a few degrees at the time the connecting or disconnecting is performed. A different feature is a method which includes, when the throttle opening of an engine for a marine vessel is changed from a predetermined opening degree to a substantially closed state, the step of advancing the spark ignition timing by a few degrees.
Inventors
- 👤 Kazuhiro Umehara
- 👤 Tsugio Sugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:48
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/1502; F02P5/1504; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
A method for controlling the ignition timing of an engine for use in a marine vessel comprising the step, when a sudden fluctuation of a load is to be generated in the engine through a connecting operation of the load at a low speed revolution of the engine, of spark advancing the ignition timing from a normal trolling time by a few degrees as said connecting operation is performed, and the step of terminating said spark advancing step a predetermined time interval after commencement thereof.
Claim 2
Independent Claim
85 words
A method for controlling the ignition timing of an engine for use in a marine vessel comprising the step, when a sudden fluctuation of a load is to be generated in the engine through a connecting operation of the load at a low speed revolution of the engine, of spark advancing the ignition timing from a normal trolling time by a few degrees as said connecting operation is performed, and the step of terminating said spark advancing step a predetermined time interval after commencement thereof.
Claim 3
Independent Claim
78 words
A method for controlling the ignition timing of an engine for use in a marine vessel comprising the step, when a sudden fluctuation of a load is to be generated in the engine through engagement of gear which facilitates connection of the load to the engine at a low speed revolution of the engine, of spark advancing the ignition timing from a normal trolling time by a few degrees in direct response to physical engagement of said gear.
Claim 4
Independent Claim
78 words
A method for controlling the ignition timing of an engine for use in a marine vessel comprising the step, when a sudden fluctuation of a load is to be generated in the engine through engagement of gear which facilitates connection of the load to the engine at a low speed revolution of the engine, of spark advancing the ignition timing from a normal trolling time by a few degrees in direct response to physical engagement of said gear.
Claim 5
Dependent Claim
22 words
A method according to claim 2, including the step of terminating said spark advancing step a predetermined time interval after commencement thereof.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |